Collapsible core



O. J. KUHLKE GDLLAPSIBLE CORE April l5, 1924. 1,490,468

Filed Aug. 25. 1922 Patented Apr. l5, 1924.

UNITED STATES Y 1,490,468 PATENT orifice.

OTTO l'. XUHLXE, OF AKBON, 0R10, ASSIGNOR T0 THE KUHLKE MACHINE COMPANY,

OF AKRON, OHIO, A. CORPORATION F OHIO.

CLLAPSIBLE CORE.

Application tiled August 23, 1822. Seria! No. 584,314.

To all whom it may concern.'

Be it known that I, O'rro J. Komaan, a. citizen of the United States, and a resident of Akron, county of Summit, State of Ohio, have invented certain new and useful m rovements in Collapsible Cores, of which the followin is a specification.

The object of t is invention is to construct a form of core for use in the manufacture of tires, which is capable of being colla sed without being removed from the stan or machine on which it is mounted. The core, as shown, is designed to embody a simple and easily operate core construction which does not necessitate a complicated mechanism to break it down or collapse it.

One form only of the invention is shown in this application, it being obvious that other forms may be devised which. einbodv the general principles set forth without dparting-,from the spirit of the invention or sacrificing any of the benefits thereof, and such as fall within the scope of the invention are intended to be covered herein.

in the drawings:

Figure 1 is a sido elevation of the iniproved collapsible core, the core 1n assembled position being shown in full lines, and in collapsed sition in dotted lines;

Figure 2 is a p an view of the core colla Sed; v

Edi re 3 is a plan view of the core assemb ed;

Figure I4 is a detail of the hinge construction; and l Figure 5 is a section through the shaft.

The core perfected by me -is divided into a plurality of sections, one of which is rigid with respect to the shaft on' which it is mounted and the others are connected to the rigid section Sothattlie various sections are not separable from the rigid section, but may be moved into position so that the tire can be removed.

The problem which has presented itself to designers of cores of this general ty has been the provision'of some means which. the several core sections can be moved and contained within the circumference of the annular, unstretchable beads on the inner edges of the tire, so that the latter could be removed. In prior constructions this has been sought to be done by' constructing one or more sections so that they can bc detached from the remaining sections and removed from within the circumference of the tire bead to permit the remaining sections to be collapsed Within the bead li-ne.

In my improved collapsible core, however, the sections of the core are so arranged and connected that in the collapsing of the core, none of the sections are detached from one another, but all are brought within the area of the bead circumference.

In tires of standard construction at the present time, for example, x 5 tires, the diameter of the bead of the tire is approximately 25 inches, and in order to enable the tire to pass over the sections in collapsed form, it is necessary to remove the sections laterally to the proper extent. This has been accomplished, as will be seen from the description of the invention, Without detachin them t at they can be collapsed in substantially helical form, in which form the tire can be removed.

In the drawings, the numeral 1 represents the shaft on which the core is sup orted, and 2 a flanged sleeve mounted on t e end of the shaft.

Thefcore comprises a rigid section 3 which is carried on arms 4 that converge to a hub 5 adapted to be passed over the sleeve and 'scoured to the flange by bolts 6'. In order to complete the annular tire form or core, it is divided into a plurality of sections, here shown as four in number, arranged in two groups of two each on either side 4of a mager cut or division line 7, shown diametrical y opposite the rigid section 3. The number of sections, 'the grouping thereof, and the arran ement of the principal cut may be varie as desired within the scope and general principles of the invention.

The major cut 7 is arranged on a curved line` the eneral plane of which is at an angle to t e plane of the core, for reasons that will be apparent u on further description of -the invention. his cut is obtained by placing two com lementary plates 8 and 8n 1n the mold at t e time of casting the core.

The ri ht hand 'group of core sections are numbe 9 and 10 from the cut 7 and are divided from each other and from the stationary section by straight radial cuts. The left hand group are numbered similari 11 and 12 and are similarly divided. en

any of the sections, but so hinging roo the core sections are in position to form the complete annular core, the sections 9 and 11 are held together to maintain the core in position by any suitable means. That shown herein comprises a pllate 13 which is secured to the inner peri ery of the core and extends across the s it, bein provided at its outer end with a ug 14 w ich is received in a corresplonding recess in the inner periphery of t e sectlon 11. The plate is secured in locking position by a swinging link 15 and an eccentric locking lever 16.

When it is desired to collapse the core, the fastening is released and the section 9 is first swun toward the center of the core, the inwar movement of the section being regulated by a stop 17 adapted to contact the section 10. The section 9 swings downwardly on a hin 18 between the sections 9 and 10, the pini; 19 of which hinge is arranged at an inclined angle tothe plane of the core so that the section 9 swings outwardly from the plane of the core.

The section 10 1s now swung toward the center of the core and outwardly on its hinge 20 which is so arranged that that section follows outwardly, serving .to move the section 9 further outwardly from the plane of the core or rigid section 3, the inward limit of movementy of the section 10 being determined by the stop 21.

The section 11 is now moved inwardl on its hinge 22 against stop 23, but it wi be observed that the pintle 24 of this hinge is inclined in the opposite direction from the hinges 18 and 20 so that the section 11 moves outwardly on the opposite side of the core plane from the sections 9 and 10. The section 12 now follows in the same manner about its hinge 25 with stop 26.

The collapsed position of thel core is shown in Fi re 2 and it will be noted that the core is in substantiall the sha of a helix, lthe two arms of which exten on opposite sides of the rigid or stationary sectiorr: The space between the nearest points of the two sections is preferably large enough to permit the tire to be inserted between them to remove the lower portion Y thereof from the rigidisection.

Sofar as known to e, I am the first to so construct andl arrange a collapsible tire core so that all of the sections thereof may be moved into ition to permitvthe re moval of tires with relatively small bead diameters, without disconnectingone of the sections .from the balance. This is obviously a great advantage in-building tires. I am also the first to construct a sectional core in `which the several sections are so connected together that in movirlig them to collapsedv ition the core wi assume a substantia y helical form. The invention is not limited to. the exact arrangement of sections as other equivalent arrangements 2. In a colla sible core construction, a

roup of movab e core `sections, said sections ing hinged together end to end to move toward the center of the core and outwardly from the plane of the core.

3. In a colla sible core construction, groups of movab e core sections, certain of said sections which are adjacent to one another being hinged together so as to move in a group toward the center line of the core and outwardl from the plane of the core.

4. In a col apsible core construction, two groups of movable corevsections, said sections being hin d together so as to move in (groups towar the centerline of the core an outwardly in opposite. directions from the plane of the core.

5. In a collapsible core, a plurality of movable core sections which are hinged together, the axis of the hinge being at an inclined angle to the' plane of Athe core.

6. InV a' collapsible core a rigid section' and a plurality of mova le core sections which are hinged to ther, the axes of the hnges being at an inc ined angle to the plane of t e core. p

7. In; a collapsible core a rigid section and a plurality of mova le core sections which are hinged together in oups at the ends of the rigid section the in es of the said grou s being at inclined ang es to the yplane of t e core.

8. `In a collapsible core a rigid section and a plurality of mova le core sections which are hinged together in groups at the ends of the rl d section, the inges of the said grou ing at oppositely inclined angles wit respect to the plane of the core.

9. In a collapsible core, a rigid section and a group of movable core sections which are hinged together to form an approximate helix rin collapsed osition.

10. In a co lapsilile core, a rigid section lll and a group of movable sections, said movable sections bein hinged to the end of the rigid section' an hinged together to move toward the center line of the core'and outwardl from the plane of the core.

11. nia collapsible core, a rigid section and a plurality of movable core sections which are hinged to ther, the axis of the hin being arrangede to t e lane of the core.

12. n a collapsibleV core, a pluralit of at an inclined angle y core sections which are all connecte to- `"glethexil swing toward the center of the core and atthe samp time outwardly from the plane of the core.V l

y13. In a colla siblef'core, a plurality of core sections wiich are arranged` in two -groris all connected together to swing towa the center of the core, the said groups movi apart Parallel to the axis of the core.

14. n a. co lapsible core, a plurality of movable Icrore sections and a rlgid section, the movable core sections being mounted to swing toward the center of the core and at the same time outwardly from the plane of the core.

15. In a collapsible core, a plurality of movable core` sections and a rigid core section, the movable core sections being arranged to swing toward the center of the core and outwardly along the axis of the core to a position outside the plane of the more.

16. In a collapsible core, a rigid core section and a plurality of movable core sections, said movable core sections being arranged in two groups, the sections of each group being arranged to swin toward the center of the core and outwar ly along the axis of the core to a position outside the plane of the core.

17. In a .collapsible core, a rigid core Section and a plurality of movable core sections, said movable core sections being arranged in two groups, the sections 'of e h group being arranged to swing toward center of the core and outward y in opposite directions from the lane of the core.-

18. In a collapsib e core, a plurality Vof core sections hin ld together and divided by a major cut, the gin s between said sections being inclined to t e plane of the core so that the core may be wound into a helix of smaller diameter than the inner periphery of the core. y

19. A collapsible core divided into a plurality of sections, a `single pivot for one of said sections arranged at an angle to the plane of the core so that it will move inwardly toward the axis of the core and at thesame time outwardly from the plane of the core.

20. A collapsible core divided into a lurality of sections, a section being hinge to move inwardly toward the center of the core, the axis of said hinge being at an inclined angle to the plane of the core.

21. A collapsible core divided into a lurality of sectlons, a section being attac ed f to its next adjacent section so that in colf,

lapsing the core it is compelledi to shift in a single movement toward the `enter of the core and outwardly from the plane thereof.

OTTO J. KUHLKE. 

